diff --git a/src/llama_stack_client/_client.py b/src/llama_stack_client/_client.py
index a8489b0f..33e23819 100644
--- a/src/llama_stack_client/_client.py
+++ b/src/llama_stack_client/_client.py
@@ -2,35 +2,22 @@
 
 from __future__ import annotations
 
+import json
+
 import os
-from typing import Any, Union, Mapping
-from typing_extensions import Self, override
+from typing import Any, Mapping, Union
 
 import httpx
+from typing_extensions import override, Self
 
-from . import resources, _exceptions
+from . import _exceptions, resources
+from ._base_client import AsyncAPIClient, DEFAULT_MAX_RETRIES, SyncAPIClient
+from ._exceptions import APIStatusError
 from ._qs import Querystring
-from ._types import (
-    NOT_GIVEN,
-    Omit,
-    Timeout,
-    NotGiven,
-    Transport,
-    ProxiesTypes,
-    RequestOptions,
-)
-from ._utils import (
-    is_given,
-    get_async_library,
-)
+from ._streaming import AsyncStream as AsyncStream, Stream as Stream
+from ._types import NOT_GIVEN, NotGiven, Omit, ProxiesTypes, RequestOptions, Timeout, Transport
+from ._utils import get_async_library, is_given
 from ._version import __version__
-from ._streaming import Stream as Stream, AsyncStream as AsyncStream
-from ._exceptions import APIStatusError
-from ._base_client import (
-    DEFAULT_MAX_RETRIES,
-    SyncAPIClient,
-    AsyncAPIClient,
-)
 
 __all__ = [
     "Timeout",
@@ -91,6 +78,7 @@ def __init__(
         # outlining your use-case to help us decide if it should be
         # part of our public interface in the future.
         _strict_response_validation: bool = False,
+        provider_data: Mapping[str, Any] | None = None,
     ) -> None:
         """Construct a new synchronous llama-stack-client client instance."""
         if base_url is None:
@@ -98,6 +86,11 @@ def __init__(
         if base_url is None:
             base_url = f"http://any-hosted-llama-stack.com"
 
+        if provider_data:
+            if default_headers is None:
+                default_headers = {}
+            default_headers["X-LlamaStack-ProviderData"] = json.dumps(provider_data)
+
         super().__init__(
             version=__version__,
             base_url=base_url,
@@ -274,6 +267,7 @@ def __init__(
         # outlining your use-case to help us decide if it should be
         # part of our public interface in the future.
         _strict_response_validation: bool = False,
+        provider_data: Mapping[str, Any] | None = None,
     ) -> None:
         """Construct a new async llama-stack-client client instance."""
         if base_url is None:
@@ -281,6 +275,11 @@ def __init__(
         if base_url is None:
             base_url = f"http://any-hosted-llama-stack.com"
 
+        if provider_data:
+            if default_headers is None:
+                default_headers = {}
+            default_headers["X-LlamaStack-ProviderData"] = json.dumps(provider_data)
+
         super().__init__(
             version=__version__,
             base_url=base_url,